cortis



N 6|3343.' Patented Nov. l, |898.

l F. A. CURTIS.

' LAMP.

(Application led Mar. 20. 1896. .5.. me Model.)

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NrrED STATES FRANK A. CORTIS, OF MERIDEN, CONNECTICUT, ASSIGNOR OFONE-HALF TO DWIGHT T. CORTIS, OF BOSTON, MASSACHUSETTS.

LAM P.

SPECIFICATION forming' part of Letters Patent No. 618,648, datedNovember 1, 1898.

Application filed March 20, 1896. Serial No. 584,109. (No model.)

To all whom 15m/ay concern,.-

Be it known that I, FRANK A. CURTIS, a citizen of the United States, anda resident of Meriden, in the county of New I-Iaven and State ofConnecticut, have invented certain new and useful Improvements in Lamps,of which the following is a full, clear, and exact description,wherebyany one skilled in the art can make and use the same.

My invention relates particularly to the class of sO-called lamps whichare used in the Welsbach system, where a mantle or veil of extremelyfragile material is used, this mantle being brought to a high state ofincandescence to provide the luminous body in the lamp. In lamps of thisconstruction, owing to the fragile nature of this mantle, a jar or shockcomparatively light in degree will cause the mantle, which is supportedfrom 3o .a whole, and in the combination of such parts,

as more particularly hereinafter described, and pointed out in theclaims.

Referring to the drawings, Figure lis a view in side elevation of a lampembodying my improvement with parts cut away to show construction. Fig.2 is a detail view, on enlarged scale, showing the cushion. Fig. 3 is adetail view, on enlarged scale, showing a modifled form of cushion andits arrangement. Fig-4 is a detail top or plan view of the airshutterand spring-cushion.

In the accompanying drawings my invention is illustrated in connectionwith a single lamp of the kind described, and the letter ct denotes agas-bracket on which the lamp as a whole is supported. A feature of thisform of lamp includes means for controlling the quantity of air whichmay be allowed to unite with the illuminating-gas before the latter isignited at the upper end of the burner, and

this device, known as the shutter, is de= noted by the letter b. Thisair-shutter h is a hollow device, usually of thin metal, as brass,

with air-ports through the lower part adapt' ed to be closed to agreater or less degree by means of a sliding damper, and there issufficient space within the body of this device and outside the centraltube o, in which the air and gas are mixed, to permit the spring of anelastic cushion e to be arranged.

Prior to my invention the chimney-gallery f (which supports the chimneyg, a mantle h, and in most instances a shade) .has been supporteddirectly on top of the air-shutter, the mixing or central tube cextending through a central opening in the chimney-gallery, as shown indotted line in Fig. l, which gallery is thus supported firmly in anupright position. When the parts are so supported, any jar given to thegas-bracket or other support for the lamp or the lamp itself iscommunicated di; rectly to the chimney-gallery and mantle-support andcauses the mantle to break short off at the neck or upper portion, andthus become destroyed. In order to avoid this, a springA cushion or likeelastic device e is interposed between the mantle-support (in thisinstance the chimney-gallery) and the bracket or part fast to Ythebracket. The mantle 71. is supported usually from a loop formed on theupper end of a rod h', which rod is secured in a socket h2 in thechimney-gallery as by means of a clamp-screw, the head of which is shownat h3. In one form, as shown in Figs. 1 and 2, the spring c within thebody of the air shutter supports a washer e2, from which rods e3,extending through holes in the upper part of the air-shutter, projectupward and support a collar e4, on which the chimney-gallery is directlysupported. The elastic cushion thus takes the whole weight Yof thechimney-gallery, chimney, and other parts and provides a supportsufficiently sensitive to prevent any shock or vibration whatever fromextending beyond the bracket tothe detriment-of the mantle.

The lower burner-tube c, which is rigidly secured to the support a,extends upward through the air-shutter and within the burner'- tube Z,that terminates in a cap lo', usually IOO having a perforated top,abovewhich the flame extends when the lamp is lighted and over which thelower end of the mantle 72, drops, as shown in Fig. l of the drawings.This burnertube 7a has a free sliding movement up and down upon the tubec, limited in extent by the spring-cushioue. This upper section k of theburner-tube is sufficiently loose to enable the parts of the telescopicburner-tube to move freely, so as to support the mantle and insulate itfrom vibrations and shocks.

The modiiied form of my invention,as shown in Fig. 3, consists of acushion in which the spring member t' is mounted between two collars t"i2, the lower collar 'i2 resting on top of the air-shutter and thecollar i underlying the bottom of the cl1imney-gal1ery,no part of thisbeing arranged or located Within the airshutter. This form of cushion iseasily adapted to the present forms of burner and air-shutter Withoutrequiring any change in their structure.

I claim as my inventionl. The combination in an incandescent gasburner,of a spring-support constructed to carry the mantle and prevent undueVibration and shaking thereof, with a telescopic tubular connection forsupplying gas Without interfering With the action of the spring-support.

2. The combination in an incandescent burner, of a bracket or likesupport for the lamp as a Whole, a telescopic burner-tube for supplyinggas, a mantle-support, and a yielding cushion interposed between thefixed section and the movable section of the burnertube,whereby gas issupplied Within the mantle Without interfering with the action of thespring-support.

3. In combination with a bracket or like support for a lamp having afragile mantle over the ame, an air-shutter, a yielding cushion locatedin the shutter, and the 1nantle-support resting upon the yieldingcushion, all substantially as described.

4E. In combination with a bracket or like support for a lamp having afragile mantle over the flame, an airshutter, an elastic cushion locatedWithin the shutter, supports extending from the cushion upward throughthe mantle, and the mantle-support mounted on the supports from theyielding cushion, all substantially as described.

5. In combination with a bracket or like support for a lamp having afragile mantle over the flame, an air-shutter, a spring l0- cated Withinthe shutter, a collar borne on the spring, supports extending upwardfrom the collar through the Wall of the shutter, a collar secured to theupper part of the supports, and a mantle-support borne on said collar,all substantially as described.

6. In combination with a bracket or like support for a lamp having afragile mantle over the llame, an air-shutter, a yielding cushionlocated in the shutter, a chimneygallery supported on the yieldingcushion, and a mantle-support secured to the chimneygallery, allsubstantially as described.

7. In combination with a bracket or like support for a lamp having afragile mantle over the iiame, a tubular connection between the supportand the burner of said lamp, a mantle-support, and a yielding cushioninterposed between the lam p-support and the mantle-support.

8. In combination in an incandescent burner, of a spring-supportconstructed to support a mantle and prevent undue vibration or shakingthereof, with a tubular connection for supplying iiuid Withoutinterfering With the action of the spring-support.

FRANK A. CORTIS.

Witnesses:

GEO. M. CLARK, GEO. S. CLARK.

